/Engine/Plugins/Experimental/Water/Source/Runtime/Public/GerstnerWaterWaveSubsystem.h
UGerstnerWaterWaveSubsystemmanages allUGerstnerWaterWavesobjects, regardless of which world they belong to (it's aUEngineSubsystem)
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)() class UGerstnerWaterWaveSubsystem : public [UEngineSubsystem](API\Runtime\Engine\Subsystems\UEngineSubsystem)